松软破碎围岩巷道变形机理及非对称控制
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摘要
以红岭煤矿15141综放工作面回采巷道为研究背景,综合采用现场调研、理论计算、数值模拟和工业性试验等手段,研究了采动应力作用下松软破碎围岩应力分布规律,据此确定了合理的护巷煤柱宽度,并揭示了松软破碎围岩巷道应力演化规律及变形机理;针对性地提出了松软破碎围岩巷道非对称控制技术。现场试验表明:留设窄煤柱护巷并采用高阻力、高预应力、非对称耦合支护与高水速凝材料注浆加固技术相结合,可以有效控制采动应力影响下松软破碎围岩巷道变形,保障巷道在服务期间的围岩稳定。
Taking the mining roadway of Hongling Coal Mine 15141 fully mechanized caving face as the research background,combined with field survey, theoretical analysis, numerical calculation and field test, the stress of soft broken surrounding rock stress distribution law of mining roadway is studied, the reasonable width of protective pillar is determined, the evolution laws and stability mechanism of stress and strain of soft broken surrounding rock are revealed; on this basis, the asymmetric control technology of soft broken surrounding rock roadway is proposed. Field application shows that: setting up narrow coal pillar support and the use of high resistance, high prestress and asymmetric coupling support with high water quick setting grouting material technology, the dynamic pressure under the influence of soft rock roadway deformation can be effectively controlled, the stability of surrounding rock can be guaranteed during the service period.
Taking the mining roadway of Hongling Coal Mine 15141 fully mechanized caving face as the research background,combined with field survey, theoretical analysis, numerical calculation and field test, the stress of soft broken surrounding rock stress distribution law of mining roadway is studied, the reasonable width of protective pillar is determined, the evolution laws and stability mechanism of stress and strain of soft broken surrounding rock are revealed; on this basis, the asymmetric control technology of soft broken surrounding rock roadway is proposed. Field application shows that: setting up narrow coal pillar support and the use of high resistance, high prestress and asymmetric coupling support with high water quick setting grouting material technology, the dynamic pressure under the influence of soft rock roadway deformation can be effectively controlled, the stability of surrounding rock can be guaranteed during the service period.
引文
[1]侯朝炯.深部巷道围岩控制的有效途径[J].中国矿业大学学报,2017,46(3):467-473.
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[3]李伟.深部巷道围岩稳定性安全控制原理与应用研究[D].青岛:山东科技大学,2010.
[4]龙景奎.深部巷道围岩协同锚固机理研究与应用[D].徐州:中国矿业大学,2015.
[5]王伟军,袁超,余伟健.深部大变形巷道围岩稳定性控制方法研究[J].煤炭学报,2016,41(12):2921-2931.
[6]柏建彪,侯朝炯.深部巷道围岩控制原理与应用研究[J].中国矿业大学学报,2006,35(2):145-148.
[7]何满潮,齐干,徐云良,等.深部软岩巷道锚网索耦合支护设计及施工技术[J].煤炭工程,2007(3):30-33.
[8]王襄禹,柏建彪,胡忠超.软岩巷道围岩的流变特性及其控制技术分析[J].煤炭工程,2008(2):73-75.
[9]郭文兵,李楠,王有凯.软岩巷道围岩应力分布规律光弹性模拟实验研究[J].煤炭学报,2002,27(6):596.
[10]孙晓明,张国锋,蔡峰,等.深部倾斜岩层巷道非对称变形机制及控制对策[J].岩石力学与工程学报,2009,28(6):1137-1143.
[2]康红普.深部煤矿应力分布特征及巷道围岩控制技术[J].煤炭科学技术,2013,41(9):12-17.
[3]李伟.深部巷道围岩稳定性安全控制原理与应用研究[D].青岛:山东科技大学,2010.
[4]龙景奎.深部巷道围岩协同锚固机理研究与应用[D].徐州:中国矿业大学,2015.
[5]王伟军,袁超,余伟健.深部大变形巷道围岩稳定性控制方法研究[J].煤炭学报,2016,41(12):2921-2931.
[6]柏建彪,侯朝炯.深部巷道围岩控制原理与应用研究[J].中国矿业大学学报,2006,35(2):145-148.
[7]何满潮,齐干,徐云良,等.深部软岩巷道锚网索耦合支护设计及施工技术[J].煤炭工程,2007(3):30-33.
[8]王襄禹,柏建彪,胡忠超.软岩巷道围岩的流变特性及其控制技术分析[J].煤炭工程,2008(2):73-75.
[9]郭文兵,李楠,王有凯.软岩巷道围岩应力分布规律光弹性模拟实验研究[J].煤炭学报,2002,27(6):596.
[10]孙晓明,张国锋,蔡峰,等.深部倾斜岩层巷道非对称变形机制及控制对策[J].岩石力学与工程学报,2009,28(6):1137-1143.